" (a) "|[a,b-c,c+b],[a+b,b,c-alpha=(a+b+c)(a^(2)+b^(2)+c^(2))],[a-b,b+a,c]|=(a+b+c)(a^(2))

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Show that |(a,b-c,c+b),(a+c,b,c-a),(a-b,b+a,c)|=(a+b+c)(a^(2)+b^(2)+c^(2))

Show that: |[a,b-c,c+b],[a+c,b,c-a],[a-b,b+a,c]|=(a+b+c)(a^2+b^2+c^2) .

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